Schneider Electric (Erie) 680-243-5 Switch

The Schneider Electric Erie 680-243-5 is a professional-grade seasonal changeover switch designed for 2-pipe hydronic systems. This strap-on thermostat switch utilizes a snap-acting SPDT (Single-Pole, Double-Throw) contact form to automatically transition local terminal controls between heating and cooling modes. By monitoring the supply water temperature, it eliminates the need for manual seasonal intervention, ensuring the HVAC/R system responds accurately to boiler or chiller activation.

Engineered for versatility, the Erie 680-243-5 is compatible with both low voltage and line voltage applications. The unit features 36-inch color-coded leads for flexible wiring and is designed for direct mounting on 5/8" or 7/8" O.D. copper tubing or iron piping. The included spring clip hardware provides a secure, thermal-conductive connection to the pipe surface for precise temperature sensing. With a rugged design capable of handling up to 5A resistive loads at 240 VAC, this changeover switch is a standard component for maintaining sequence control in fan coil units and air handlers.

• Automatic System Switching: Provides seamless heating/cooling changeover based on induction pipe temperature.
• Universal Compatibility: Mounts easily to 5/8" and 7/8" O.D. piping using the included spring clip.
• Flexible Installation: Features 36-inch leads and high-clearance housing for tight mechanical spaces.
• Line Voltage Rated: Rated for up to 120/240 VAC for integration with various HVAC control circuits.
• Snap-Acting Mechanism: SPDT contacts ensure rapid and reliable switching to prevent arcing and signal bounce.

Common Questions

How do I install the 680-243-5 on different pipe sizes?
The included spring clip is specifically sized for 5/8" and 7/8" O.D. copper or iron pipes. Ensure the pipe surface is clean of debris or insulation for optimal thermal contact.

Can this switch be used with a 24V thermostat?
Yes, the 680-243-5 is a dry contact SPDT switch that works with 24V (low voltage) or 120/240V (line voltage) control signals.

What is the maximum operating temperature for this strap-on switch?
The device is rated for a maximum ambient operating temperature of 125°F. For high-temperature steam applications, verify that the surface temperature does not exceed manufacturer physical limits.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.